MongoDB C100DBA Exam Practice Test Instant Access

Question 1

Suposse tou have the following collection with only 2 documents:

If you run an aggregation query and use { $unwind: "$traits" } as the first stage, how many documents will be passed to the next stage of the aggregation pipeline?

Answer : B

Question 2

Which of the following is supported by MongoDB?

ATransaction Management

BACID Transactions

CJournaling

DRelationships between Collections (Primary Key Foreign Key)

Answer : C

Question 3

Which of the following does MongoDB use to provide High Availability and fault tolerance?

ASharding

BIndexing

CReplication

DWrite Concern

Answer : C

Question 4

Which of the following node is used during election in a replication cluster?

Aprimary

Barbiter

Chidden

Dsecondary

Answer : B

Question 5

Which of the following index would be optimum for the query?

Select all valid. db.test.find( { a : 5, c : 2 })

Adb.test.ensurelndex( { c:l, a: 1})

Bdb.test.ensurelndex( { a : 1, c: 1, d: 1, b : 1})

CCH db.test.ensurelndex( { a :1, c:l})

Ddb.test.ensurelndex( { a: 1, b :1, c:l, d:l})

Answer : B, C

Question 6

Mongodb does provide high availability via which option?

AReplication

BIndexing

CSharding

DJournaling

Answer : A

Question 7

The MongoDB explain() method does not support which of the following verbosity mode:

AexecutionStats

BqueryPlanner

CcustomExecutionStats

DallPlansExecution

Answer : A

MongoDB C100DBA MongoDB Certified DBA Associate Exam Practice Test